AirHint found the following cheapest return flights from Chicago (MDW) to Sao Paulo (GRU) in March 2026 (see full year).

Return flights

13 Mar - 24 Mar	LATAM Airlines Group
11 Mar - 16 Mar	Frontier Airlines
01 Mar - 08 Mar	Frontier Airlines
10 Mar - 25 Mar	Frontier Airlines
12 Mar - 25 Mar	Frontier Airlines
13 Mar - 13 Apr	LATAM Airlines Group
27 Mar - 30 Mar	LATAM Airlines Group
13 Mar - 25 Mar	LATAM Airlines Group
11 Mar - 11 Apr	Frontier Airlines
15 Mar - 16 Apr	Frontier Airlines
06 Mar - 15 Mar	Delta
15 Mar - 15 Apr	Delta
09 Mar - 11 Apr	Frontier Airlines

Also check the deals for one-way flights from Chicago to Sao Paulo in March.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Chicago to Sao Paulo in March from 596€

Return flights